Tank pump



FIG. 1 is a right side view of my new design for a tank pump;

FIG. 2 is a left side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side perspective view thereof; and,

FIG. 8 is a right side elevation view thereof.

The broken lines in the drawings are for the purpose of illustrating unclaimed portions and form no part of the claimed design. 

CLAIM The ornamental design for a tank pump, as shown and described. 